Cutting insert



FIG. 1 is a first perspective view of a cutting insert showing my new design;

FIG. 2 is a second perspective view;

FIG. 3 is a front view;

FIG. 4 is a rear view;

FIG. 5 is a right side view;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom view.

The broken lines represent the unclaimed portions of the cutting insert and form no part of the claimed design. 

CLAIM The ornamental design for a cutting insert, as shown and described. 